Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Formation of core/corona nanoparticles with interpolyelectrolyte complex cores in aqueous solution: Insight into chain dynamics in the complex from fluorescence quenching
Δημιουργός/Συγγραφέας:	Murmiliuk A. Matějíček P. Filippov S.K. Janata M. Šlouf M. [EL] Πίσπας, Στέργιος[EN] Pispas, Stergios Štěpánek M.
Εκδότης:	Royal Society of Chemistry
Ημερομηνία:	2018
Γλώσσα:	Αγγλικά
ISSN:	1744-683X
DOI:	10.1039/c8sm01174e
Άλλο:	PubMed ID: 30140809
Περίληψη:	Formation of interpolyelectrolyte complexes (IPECs) of poly(methacrylic acid) (PMAA) bearing a fluorescent label (umbelliferone) at the chain end and poly[3,5-bis(trimethyl ammoniummethyl)-4-hydroxystyrene iodide]-block-poly(ethylene oxide) (QNPHOS-PEO) acting as a fluorescence quencher, was followed using a combination of scattering, calorimetry, microscopy and fluorescence spectroscopy techniques. While scattering and microscopy measurements indicated formation of spherical core/corona nanoparticles with the core of the QNPHOS/PMAA complex and the PEO corona, fluorescence measurements showed that both static and dynamic quenching efficiency were increased in the nanoparticle stability region. As the dynamic quenching rate constant remained unchanged, the quenching enhancement was caused by the increase in the local concentration of QNPHOS segments in the microenvironment of the label. This finding implies that the local dynamics of PMAA end chains affecting the interaction of the label with QNPHOS segments was independent of both PMAA and QNPHOS chain conformations.
Τίτλος πηγής δημοσίευσης:	Soft Matter
Τόμος/Κεφάλαιο:	14
Τεύχος:	37
Σελίδες:	7578-7585
Θεματική Κατηγορία:	[EL] Φυσική και θεωρητική χημεία[EN] Physical and theoretical chemistry [EL] Φασματοσκοπία[EN] Spectroscopy
Αξιολόγηση από ομότιμους (peer reviewed):	Ναι
Κάτοχος πνευματικών δικαιωμάτων:	© 2018 The Royal Society of Chemistry.
Σημειώσεις:	UNCE/SCI/014; Technology Agency of the Czech Republic, TACR; European Synchrotron Radiation Facility, ESRF This work has been supported by the Ministry of Education, Youth and Sports of the Czech Republic (Operational Programme Research, Development and Education: ‘‘Excellent Research Teams’’, Project No. CZ.02.1.01/0.0/0.0/15_003/0000417-CUCAM, and the National Sustainability Programme NPU I – POLYMAT LO1507), by the Charles University Research Centre (Programme No. UNCE/SCI/014) and by the Technology Agency of the Czech Republic (Project No. TE01020118).
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο